... , followed by intramolecular transesterification-enol formation and Claisencondensation of the ketoacetonitrile tautomer with ester ... group. see article for more examples Key Words 3(2H )-furanones ID: ...

... followed by the Johnson modification of the Claisen rearrangement gave 10, that was carried ... nitrile underwent epimerization followed by intramolecular aldol condensation. Deprotection of 17 led to a ...